JP2017150243A - Manhole renewal method and joining part structure of renewal manhole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manhole renewal method and a joining part structure of a renewal manhole capable of restraining the occurrence of damage by an earthquake.SOLUTION: A renewal manhole 10 interposes an elastic seal layer 4 having viscoelasticity between vertically arranged manhole renewal members 2, and a collar member 5 is arranged over a lower end part of the upper side manhole renewal member 2 and an upper end part of the lower side manhole renewal member 2 on the outer peripheral side of an elastic seal layer 4. In the elastic seal layer 4, a seal member 42 is arranged along an inner peripheral surface of the collar member 5 near the outer periphery of the manhole renewal member 2. A spacer member 41 for securing an interval between the mutual upper-lower manhole renewal members 2 is provided near the inner periphery of the manhole renewal member 2. These seal member 42 and spacer member 41 are press-fitted to respective end surfaces of the upper-lower manhole renewal members 2.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a manhole rehabilitation method and a rehabilitation manhole junction structure obtained by the method.

  As a method for rehabilitating a deteriorated manhole, a primer is applied to the inner surface of the manhole, a manhole lining material impregnated with a thermosetting resin is inserted into the manhole, and then the manhole lining material is inflated by air pressure and thermally cured, so that the inner surface of the manhole is cured. Rehabilitation methods are known. In addition, as a method for rehabilitating manholes, a method of arranging a lining block on the inner periphery of the manhole and filling mortar between the lining block and the inner surface of the manhole has been proposed (see, for example, Patent Document 1).

  In addition, an assembly manhole construction method has been proposed in which a cylindrical ring-shaped member made of precast concrete is used as a manhole component, and these are stacked and an open cell sponge is interposed at the joint (for example, Patent Documents 2 and 3). reference.).

JP 2012-36655 A JP 2001-336167 A JP 2002-54165 A

  In recent years, in addition to rehabilitating degraded manholes, it has been strongly required to take measures to minimize the impact of earthquakes that may be experienced in manholes after rehabilitation. In particular, in a manhole having a relatively deep depth such that the underground depth reaches 5 m or more, the pipe wall may be broken or broken by an earthquake. Sewerage facilities including manholes, unlike other lifelines, have no means to replace equivalent functions in the event of an earthquake, so minimize damage so that functionality can be maintained even in the event of a disaster. It is requested.

  In the rehabilitation method of Patent Document 1, the manhole after rehabilitation is increased in weight to prevent ascent during an earthquake. However, no consideration is given to breakage, breakage, or the like in the connecting portion between the lining blocks or the tube wall. Since the cylindrical ring-shaped member disclosed in Patent Documents 2, 3 and the like is a precast concrete member having a thickness at the joint portion, it is possible to provide a concave groove or a convex shape to interpose an elastic body. A synthetic resin member that is durable and lightweight than a precast concrete member is more suitable for rehabilitation of manholes. However, since a synthetic resin member is thinner than a precast concrete member, such a method cannot be applied to the joint.

  Therefore, the present invention has been made in view of the above problems, and its purpose is to rehabilitate manholes using manhole rehabilitation members and to have the ability to absorb vibration and displacement caused by earthquakes. The present invention relates to a manhole rehabilitation method and a rehabilitation manhole joint structure capable of suppressing the occurrence of breakage.

  The solution of the present invention to achieve the above object is a manhole rehabilitation method in which a plurality of manhole rehabilitation members are stacked in the axial direction to form a new inner wall surface in the existing manhole, and the upper and lower manhole rehabilitations are stacked. The manhole rehabilitation member installed at least on the lower side of the member has a receiving portion projecting along the circumferential direction on the outer surface, and a spacer member made of an elastic body is disposed on the upper end surface. As a manhole rehabilitation method, a manhole rehabilitation member to be installed on the lower side is suspended from an existing manhole, and a cylindrical collar member having an inner diameter larger than the outer diameter of the manhole rehabilitation member is used. A step of installing on the receiving portion of the member, a step of hanging a manhole rehabilitation member to be installed on the inner peripheral side of the collar member and installing it on the spacer member, and a plurality of continuous up and down And a step of filling and hardening a grout material between the outer surface of the manhole rehabilitation member and the outer surface of the collar member and the inner surface of the existing manhole. And it is set as the structure which loads the sealing member which has viscoelasticity between the manhole renovation member which continues up and down.

  By this specific matter, a new rehabilitated manhole inner surface can be efficiently formed in the existing manhole using the manhole rehabilitating member made of synthetic resin. Since the manhole rehabilitation member is excellent in corrosion resistance and chemical resistance and relatively lightweight, it can be easily constructed with good workability. Since a seal member is loaded between the manhole rehabilitation members, it is possible to provide a structure that allows deformation due to the seismic force received by the upper and lower manhole rehabilitation members and minimizes damage to the manholes after rehabilitation.

  In the manhole rehabilitation method, the sealing member is disposed on the upper end surface of the manhole rehabilitation member continuously in the circumferential direction and along the inner peripheral surface of the collar member, and the upper and lower manhole rehabilitation members are mutually connected. It is preferable to arrange them in close contact with each other.

  The sealing member is preferably an elastic member having lower rigidity and viscoelasticity than the spacer member, or an elastic member having a closed cell structure.

  With such a configuration, it is possible to stably maintain water-stopping on the inner and outer surfaces of the refurbished manhole and prevent water leakage, water infiltration, and the like.

  Moreover, the joint structure of the rehabilitated manhole obtained by the manhole rehabilitation method is also within the scope of the technical idea of the present invention. That is, a rehabilitation manhole joint structure in which a plurality of manhole rehabilitation members are stacked and joined in an existing manhole, and viscoelasticity is formed between cylindrical manhole rehabilitation members disposed vertically. A cylindrical collar member is disposed on the outer peripheral side of the elastic seal layer across the lower end portion of the upper manhole renewal member and the upper end portion of the lower manhole renovation member. The elastic seal layer is disposed near the outer periphery of the manhole rehabilitation member, along the inner peripheral surface of the collar member, and near the inner periphery of the manhole rehabilitation member. Spacer members that secure the spacing between the rehabilitation members, and these seal members and spacer members are pressure-bonded to the end surfaces of the upper and lower manhole rehabilitation members. And the outer surface of the outer surface and the collar member of the Hall rehabilitation member, grout is characterized by comprising filled between the existing manhole interior surface.

  Due to this specific matter, the rehabilitation manhole joint can be provided not only with sufficient water stopping properties but also with the ability to absorb vibrations and displacement due to earthquakes and the like. For this reason, it becomes possible to maintain the manhole function while minimizing the damage to the rehabilitation manhole due to earthquakes and the like.

  In the present invention, the rejuvenation manhole joint is provided with a function of absorbing vibration and displacement due to an earthquake or the like. For this reason, it is possible to simultaneously implement countermeasures against earthquakes along with rehabilitation of manholes.

It is explanatory drawing which shows the example of the manhole which applies the manhole renovation method which concerns on embodiment of this invention. It is explanatory drawing which shows 1 process of the manhole rehabilitation method which concerns on embodiment of this invention. It is a side view which shows the manhole renovation member used for the manhole renovation method which concerns on embodiment. It is a fragmentary sectional view which shows the upper end part of the said manhole renovation member. It is a fragmentary sectional view showing one process of the manhole rehabilitation method concerning an embodiment. FIG. 6 is a partial cross-sectional view showing a next step of FIG. 5. FIG. 7 is a partial cross-sectional view showing a next step of FIG. 6. It is a fragmentary sectional view which shows the junction part after construction completion. It is a fragmentary sectional view which shows the modification of the junction part by an earthquake.

  Hereinafter, a manhole rehabilitation method according to an embodiment of the present invention will be described with reference to the drawings.

  1 to 8 illustrate a manhole rehabilitation method according to an embodiment of the present invention. In the following description, the manhole 1 refers to an existing manhole that has undergone deterioration before the manhole rehabilitation method according to the present embodiment is constructed, and the rehabilitation manhole 10 refers to the manhole rehabilitation according to the present embodiment. A manhole after being repaired and rehabilitated by the method.

  As shown in FIG. 1, the manhole 1 includes a straight wall portion 11 having a cylindrical inner surface, an opening portion 12 in contact with a road surface having an inner diameter smaller than the inner diameter of the straight wall portion 11, and an upper portion of the straight wall portion 11. And an inclined wall portion 13 provided to connect to the opening portion 12. A step 15 is provided on the inner surface of the straight wall portion 11.

(Preparation process)
When rehabilitating the manhole 1, first, inspection work in the manhole 1 and carrying-in work of construction equipment are performed. Thereafter, the inclined wall portion 13 of the manhole 1 is separated from the straight wall portion 11 and removed. Thereby, let the manhole 1 be a substantially cylindrical pothole that opens to the ground.

  Next, preprocessing in the manhole 1 is performed. Specifically, dirt and corroded portions inside the degraded manhole 1 are removed. For the removal work, a high-pressure cleaning device or a keren tool is used. Moreover, the surrounding corrosion part of the invert part 14 provided in the bottom part of the manhole 1 and the installation location of the installation place of the manhole renovation member 2 mentioned later are performed (hanging process). Thereafter, step 15 provided in the manhole 1 is removed.

(Installation process)
As shown in FIG. 2, a new inner wall surface is formed in the manhole 1 by suspending the manhole rehabilitation member 2 from the manhole 1 that has completed the preparation process (installation process).

  In this installation step, a plurality of manhole rehabilitation members 2 are stacked and installed in the manhole 1 in accordance with the axial length (embedding depth) of the straight wall portion 11 in the manhole 1. For example, as shown in FIG. 3, two manhole rehabilitation members 2 are stacked one above the other, and the manhole rehabilitation members 2 are connected by a collar member 5.

(Manhole rehabilitation material)
The manhole rehabilitation member 2 is a straight tube-shaped synthetic resin member, and is a fiber reinforced resin tube that is lightweight, high in strength, and rich in corrosion resistance. As such a manhole rehabilitation member 2, for example, a fiber reinforced resin pipe having a multilayer structure made of glass fiber, unsaturated polyester resin, and cinnabar is preferable. The collar member 5 has an inner diameter larger than the outer diameter of the manhole rehabilitation member 2 and is formed in a cylindrical shape that is shorter than the manhole rehabilitation member 2. The collar member 5 may be made of a reinforced fiber resin similar to the manhole rehabilitation member 2, or may be made of a metal such as a stainless steel plate.

  Among the plurality of manhole rehabilitation members 2 to be stacked, the manhole rehabilitation member 2 to be installed at least on the lower side is provided with a flange-shaped receiving portion 3 projecting from the outer surface along the circumferential direction. When two manhole rehabilitation members 2 are stacked up and down for rehabilitation, a receiving portion 3 is provided on the outer surface of the lower manhole rehabilitation member 2 to be installed at the bottom of the manhole 1. As shown in an enlarged view in FIG. 4, the receiving portion 3 is integrally joined to the upper end of the outer surface of the manhole rehabilitation member 2. The receiving part 3 is preferably a member having a rectangular cross section made of synthetic rubber or fiber reinforced resin. The thickness of the receiving part 3 is thicker than the thickness of the collar member 5.

  Further, a spacer member 41 made of an elastic body having lower rigidity than the manhole rehabilitation member 2 is disposed on the upper end surface of the manhole rehabilitation member 2. The spacer member 41 is, for example, a synthetic rubber-like annular member having a rectangular cross section, and is bonded to the inner periphery of the upper end surface of the manhole rehabilitation member 2. The thickness of the spacer member 41 is preferably 5 to 10 mm in the case of the manhole rehabilitation member 2 having a diameter of about 800 mm and a thickness of about 16 mm.

  The spacer member 41 is formed in a long quadrangular prism shape, and is disposed with the first side surface being in close contact with the upper end surface of the lower manhole rehabilitation member 2. While maintaining the space | interval of the manhole renovation members 2 with predetermined dimension by making the 2nd surface opposite to a 1st surface contact | adhere to the lower end surface of the manhole renovation member 2 which should be hung up later and should be installed in the upper side. Close the water tightly.

  As shown in FIG. 1, in the manhole 1, a connection port 16 of a buried horizontal pipe to be connected is opened at the bottom. The manhole rehabilitation member 2 to be installed on the lower side is formed with a notch portion 21 facing the lower portion corresponding to the connection port 16. The notch 21 is provided in advance before the manhole rehabilitation member 2 is suspended from the manhole 1.

  Then, as shown in FIG. 2, the manhole rehabilitation member 2 to be installed on the lowermost side is suspended in the manhole 1 so that the outer surface of the inner wall of the manhole 1 is attached. At this time, a tripod, a pulley, or the like is installed on the ground, and a plurality of lifting tools 22 are attached to the inner surface of the upper end portion of the manhole rehabilitation member 2 to suspend and support the manhole rehabilitation member 2 and move downward. Thereby, the manhole renovation member 2 which should be installed in the lowest side is installed in the bottom part of the manhole 1. FIG.

  Next, the collar member 5 is installed on the outer surface of the manhole rehabilitation member 2. Similarly to the manhole rehabilitation member 2, the collar member 5 is also suspended in the manhole 1 with the outer surface of the inner wall of the manhole 1 being attached. As shown in FIG. 5, the lower end portion of the collar member 5 is made to reach the receiving portion 3 provided on the outer surface of the manhole rehabilitation member 2. The collar member 5 is supported by the receiving portion 3 and disposed on the outer surface of the manhole rehabilitation member 2. The upper end, specifically about half, of the collar member 5 protrudes from the upper end of the lower manhole rehabilitation member 2.

  Next, a sealing member 42 that is an annular body having elasticity and a substantially T-shaped cross section is provided on the upper end surface of the lower manhole rehabilitation member 2 continuously in the circumferential direction and along the inner circumferential surface of the collar member 5. Arrange. The seal member 42 plays a role of providing water blocking between the upper and lower manhole renovation members 2 and between the manhole renovation member 2 and the collar member 5. As the seal member 42, it is preferable to use an elastic member having rigidity lower than that of the spacer member 41 and having viscoelasticity, or an elastic member having a closed cell structure. There is a gap between the inner peripheral tip of the seal member 42 and the outer peripheral surface of the spacer 41.

  For example, various viscoelastic sealing materials such as epoxy, silicone, modified silicone, polyurethane, polysulfide, acrylurethane, acrylic, butyl rubber, etc. can be used as the seal member 42. Is possible and preferred. In the case of such a seal member 42, the seal member 42 is applied to the upper end surface of the manhole rehabilitation member 2 along the inner peripheral surface of the collar member 5.

  Further, as the sealing member 42 having a closed cell structure, any closed cell sponge or closed cell rubber such as synthetic resin, natural rubber, or synthetic rubber can be used, and has elasticity that is well adapted to the manhole rehabilitation member 2. A foam is preferred. Examples of the foam material include polyurethane, polyethylene, natural rubber, and various synthetic rubbers.

The elastic modulus of the spacer member 41 is preferably about 5 to 10 N / mm ² . The elastic modulus of the sealing member 42 is preferably about 0.1 to 0.5 N / mm ² .

  Next, as shown in FIG. 6, the manhole rehabilitation member 2 to be installed on the upper side is hung down. Similarly to the lowering of the lower manhole rehabilitation member 2, the upper manhole rehabilitation member 2 is hung into the manhole 1 so that the outer surface of the inner wall of the manhole 1 is attached. As shown in FIG. 3, a lifting tool 22 is attached using a plurality of attachment holes 221 provided on the inner surface of the upper end portion of the upper manhole rehabilitation member 2, and the manhole rehabilitation member 2 is suspended and supported and moved downward. I will let you. Thereby, the manhole renovation member 2 to be installed on the upper side is installed on the lower manhole renovation member 2.

  As shown in FIG. 7, the lower end of the manhole rehabilitation member 2 to be installed on the upper side is inserted into the inner peripheral side of the collar member 5. In addition, the lower end portion of the upper manhole rehabilitation member 2 is installed on the spacer member 41 and the seal member 42 on the upper end surface of the lower manhole rehabilitation member 2. The seal member 42 is elastically deformed between the upper and lower manhole rehabilitation members 2 and is in close contact with each other. The spacer member 41 and the seal member 42 constitute the elastic seal layer 4.

  Subsequently, the connection part of the lower manhole renovation member 2 and the manhole 1 bottom part is fixed, and a water stop process is performed. These parts are finished by ironing mortar having acid resistance. Further, the space between the upper and lower manhole rehabilitation members 2 is filled with mortar or a sealing material from the inner surface of the manhole rehabilitation member 2 to finish the water stop treatment.

(Backfill process)
Next, as shown in FIG. 8, the grout material 6 is injected between the outer surface of the two manhole renewal members 2 that are vertically continuous, the outer surface of the collar member 5, and the inner surface of the manhole 1. In this case, a grout material 6 such as mortar having acid resistance is injected from the upper end of the manhole 1 between the inner surface of the manhole 1 and the manhole renewal member 2 and filled without any gap (backfilling step). The grout material 6 is also filled between the outer surface of the upper manhole retreading member 2 and the inner surface of the collar member 5 and between the outer surface of the lower manhole retreading member 2 and the inner surface of the collar member 5 without a gap. When the grout material 6 is cured, the plurality of manhole rehabilitation members 2 and the collar member 5 are fixed to the inner surface of the manhole 1.

(Finishing process)
Then, the invert part 14 is re-formed and the bottom is finished. By installing a new inclined wall (not shown) on the upper manhole rehabilitation member 2, the rehabilitation work of the manhole 1 is completed, and the rehabilitation manhole 10 is formed. Thereby, it is possible to rehabilitate the manhole 1 that has been aged and cracked or corroded on the inner surface.

(Rehabilitation manhole joint structure)
The rehabilitation manhole 10 obtained by the above-described manhole rehabilitation method has a structure in which the elastic seal layer 4 is interposed between the manhole rehabilitation members 2 arranged vertically as shown in FIG. This elastic seal layer 4 has lower rigidity and viscoelastic properties than the manhole rehabilitation member 2 and joins the upper and lower manhole rehabilitation members 2 together.

  The elastic seal layer 4 includes a seal member 42 disposed along the inner peripheral surface of the collar member 5 near the outer periphery of the manhole rehabilitation member 2, and a spacer member 41 disposed near the inner periphery of the manhole rehabilitation member 2. And. The seal member 42 and the spacer member 41 are pressure-bonded to the end faces of the upper and lower manhole rehabilitation members 2.

  The seal member 42 is continuously disposed in the circumferential direction near the outer periphery of the upper end surface of the manhole rehabilitation member 2. The spacer member 41 has a width dimension smaller than the thickness of the manhole rehabilitation member 2, and is disposed in the circumferential direction near the inner periphery of the upper end surface of the manhole rehabilitation member 2. The spacer member 41 keeps the space between the upper and lower manhole rehabilitation members 2 at a predetermined size and ensures the thickness of the seal member 42. The seal member 42 ensures water tightness between the manhole rehabilitation members 2 and water tightness inside and outside the manhole rehabilitation members 2.

  A short cylindrical collar member 5 is disposed on the outer peripheral side of the elastic seal layer 4 so as to straddle the lower end of the upper manhole rehabilitation member 2 and the upper end of the lower manhole rehabilitation member 2. The outer surface of the manhole rehabilitation member 2 is covered.

  The rehabilitation manhole 10 is integrated by filling the grout material 6 between the outer surface of the upper and lower manhole rehabilitation members 2 and the outer surface of the collar member 5 and the inner surface of the manhole 1 thus connected. The rehabilitation manhole 10 has a new smooth inner surface formed by the manhole rehabilitation member 2 and is improved in strength, durability, corrosion resistance, and chemical resistance.

  The elastic seal layer 4 at the joint part of the rehabilitation manhole 10 keeps the water-stopping property of the inner and outer surfaces of the rehabilitation manhole 10 in a normal state, and prevents water leakage and water intrusion. On the other hand, when an earthquake or the like occurs, the tube wall of the rehabilitation manhole 10 receives a horizontal shearing force. The manhole rehabilitation member 2 may be deformed or the joint may be separated. In such a case, the seal member 42 of the elastic seal layer 4 follows the deformation of the part by extending without breaking, and prevents water from entering from the outside.

  For example, as shown in FIG. 9, when the rehabilitation manhole 10 is to be deformed with respect to the ground due to earthquake vibration, the elastic seal layer 4 between the upper and lower manhole rehabilitation members 2 is allowed to deform. Since the seal member 42 of the elastic seal layer 4 is elastically deformed, the upper and lower manhole rehabilitation members 2 are allowed to be displaced relative to each other and are deformed following the displacement to absorb vibration energy. Thereby, even if a clearance gap arises between the upper and lower manhole renovation members 2, the fracture | rupture of the sealing member 42 in a junction part is prevented, the water stop is maintained, and the function as a manhole is ensured.

  As described above, by adopting the manhole rehabilitation method and the rehabilitation manhole joint structure according to the present invention, it becomes possible to self-rehabilitate the aged manhole 1 in an extremely simple manner, and vibration and displacement due to earthquakes and the like. Therefore, it is possible to provide a structure capable of holding the manhole function while minimizing the occurrence of breakage. Even in a manhole that does not have conventional seismic resistance and seismic isolation, by applying the present invention, it is possible to take measures against future earthquakes at the same time as rehabilitation.

  The present invention is not limited to the above-described embodiment, and various design changes can be made within the scope of the technical idea of the present invention. For example, the manhole rehabilitation member 2 is not limited to a form in which two manholes are stacked one above the other, and three or more manhole rehabilitation members 2 can be used depending on the depth of the manhole to be rehabilitated. At this time, it is not always necessary to apply the above-described joint structure between all the upper and lower manhole rehabilitation members 2, and this joint structure may be applied to a place necessary for design.

  The present invention can be suitably used to rehabilitate existing manholes.

DESCRIPTION OF SYMBOLS 1 Manhole 11 Straight wall part 12 Opening part 13 Slant wall part 14 Invert part 15 Step 16 Connection port 2 Manhole renovation member 21 Notch part 22 Lifting tool 3 Receiving part 4 Elastic seal layer 41 Spacer member 42 Seal member 5 Color member 6 Grout material 10 Rehabilitation manhole

Claims (5)

A manhole rehabilitation method in which a plurality of manhole rehabilitation members are stacked in the axial direction to form a new inner wall surface in an existing manhole,
The manhole rehabilitation member installed at least on the lower side of the stacked upper and lower manhole rehabilitation members has a receiving portion projecting along the circumferential direction on the outer surface and a spacer member made of an elastic body on the upper end surface. ,
A process of suspending and installing a manhole rehabilitation member to be installed on the lower side in an existing manhole,
Installing a cylindrical collar member having an inner diameter larger than the outer diameter of the manhole rehabilitation member on the receiving portion of the manhole rehabilitation member;
A process of hanging a manhole rehabilitation member to be installed on the upper side on the inner peripheral side of the collar member and installing it on the spacer member;
Filling and curing a grout material between the outer surface of a plurality of manhole rehabilitation members continuous in the vertical direction and the outer surface of the collar member and the inner surface of the existing manhole,
A manhole rehabilitation method, wherein a seal member having viscoelasticity is loaded between manhole rehabilitation members that are continuous in the vertical direction. In the manhole rehabilitation method according to claim 1,
The sealing member is disposed on the upper end surface of the manhole rehabilitation member continuously in the circumferential direction and along the inner peripheral surface of the collar member, and is disposed in close contact with the upper and lower manhole rehabilitation members. A manhole rehabilitation method characterized by this. In the manhole rehabilitation method according to claim 1 or 2,
The manhole rehabilitation method, wherein the seal member is an elastic member having lower rigidity and viscoelasticity than the spacer member, or an elastic member having a closed cell structure. A rehabilitation manhole joint structure in which a plurality of manhole rehabilitation members are stacked and joined in an existing manhole in the axial direction,
An elastic seal layer having viscoelasticity is interposed between cylindrical manhole rehabilitation members arranged above and below,
On the outer peripheral side of the elastic seal layer, a cylindrical collar member is disposed across the lower end portion of the upper manhole rehabilitation member and the upper end portion of the lower manhole rehabilitation member,
The elastic seal layer is disposed near the outer periphery of the manhole rehabilitation member along the inner peripheral surface of the collar member, and is disposed near the inner periphery of the manhole rehabilitation member so that the upper and lower manhole rehabilitation members A spacer member that secures an interval between them, and these sealing members and spacer members are pressure-bonded to the end faces of the upper and lower manhole rehabilitation members,
A joint structure for rehabilitating manholes, characterized in that a grout material is filled between the outer surface of a plurality of manhole rehabilitation members, the outer surface of a collar member, and the inner surface of an existing manhole. In the joint part structure of the rehabilitation manhole according to claim 4,
The spacer member has a width dimension smaller than the thickness of the manhole rehabilitation member, and is disposed in the circumferential direction near the inner periphery of the upper end surface of the manhole rehabilitation member,
The rehabilitation manhole joint structure, wherein the seal member is disposed in the circumferential direction near the outer periphery of the upper end surface of the manhole rehabilitation member.

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